Gasser first began snowboarding at age 18. After graduating high school, she moved to the United States to train at Mammoth Mountain, despite not knowing English well. Gasser worked as a babysitter to save enough money to afford the move to the United States to train all winter.[11] She started to compete in snowboarding in the 2010/2011 season, at age 20.[3] Before competing in slopestyle, Gasser was part of the Austrian National Gymnastics Team, but quit at age 15 because she did not like the demanding training schedule. She said she preferred snowboarding because "no one tells you what to do", and that her previous gymnastics training allowed her to transition easily into doing snowboard tricks in the air.[12][13][11] At FIS Snowboarding World Championships 2013 Gasser finished 18th. Her best World Cup result and the only podium finish before the 2014 Olympics was the third-place finish in Stoneham on 19 January 2014.[6]
In November 2013, Gasser became the first female snowboarder to perform a Cab Double Cork 900 kicker, a double salto backwards with a half-turn.[14][15][16]
Gasser won 3 X Games medals in the 2017 season.[10][8][9] She also won gold in slopestyle at the Burton US Open[17] and Gold at the snowboarding World Championships receiving a score of 100.[7]
In 2018 Gasser became the first woman to land a cab triple underflip.[18]
At the 2023 World Championships in Bakuriani, Georgia, Gasser won the gold in the big air event.[19]
Gasser qualified first for the slopestyle final event. However, she fell in both runs for the final event and was classified tenth. Aimee Fuller who was a British competitor who had been eliminated earlier, joined the BBC Sport team for the final of her event, which included Gasser.[20] Fuller and the other members of the commentary team, Ed Leigh and Tim Warwood were criticised for their reaction when Gasser fell during her final run. The incident drew more than 300 complaints.[20][21]
Anna Gasser won gold in the inaugural Big air event with a total score of 185 points. She also competed in the women's slopestyle final, where she finished 15th.
She successfully defended her Olympic Big air title by landing a Cab Double Cork 1260 in her final run.[22]
